Question

With reference to the scheme given, which of the given statement(s) about $T,U,V$ and $W$ is (are) correct?

• A. $T$ is soluble in hot aqueous $NaOH$.
• B. $U$ is optically active.
• C. Molecular formula of $W$ is $C_{10}{H}_{18}{O}_4$.
• D. $V$ gives effervescence on treatment with aqueous $NaHC{O}_3$.

Answer 1

Answer: (A), (C), (D)

$T$ is soluble in hot aqueous $NaOH$.
Molecular formula of $W$ is $C_{10}{H}_{18}{O}_4$.
$V$ gives effervescence on treatment with aqueous $NaHC{O}_3$.

The statements $A,C$ and $D$ are correct.
(A) $T$ is soluble in hot aqueous $NaOH$. In the alkaline medium, the lactone ring is hydrolyzed to form sodium salt which increases solubility.
(B) $U$ is optically inactive as no chiral center is present.
(C) Molecular formula of $W$ is $C_{10}{H}_{18}{O}_4$.
(D) $V$ gives effervescence on treatment with aqueous $NaHC{O}_3$ as it contains -COOH group which reacts with sodium hydrogen carbonate to release carbon dioxide.